Grinding or polishing machine.



T. F. PHILIPPI.

GRINDING OR POLISHING MACHINE.

APPLICATION FILED JUNE 22. I916.

Patented Mar. 13, 1917.

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H730 IPP/ T. F. PHILIPPI.

GRINDING 0R POLISHING MACHINE.

APPLICAHON FILED JUNE 22. ISIS.

Patented Mar. 13, 1917.

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T. F. PHILIPPI.

cnmnme 0R POLISHING MACHINE.

APPLICATION HLED JUNE 22.19l6. 1,219,037. Patented Mar. 13, 1917.

4 SHEETSSHEEI' 3 T. F. PHILIPPI.

GRINDING 0R POLISHING MACHINE. APPUCATION FILED JUNE 22. I916.

Patented Mar. 13, 1917.

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THEODORE F. PHILIPPI, OF EAST ST. LOUIS, ILLINOIS.

GRINDING on POLISHING MACHINE.

Application filed June 22, 1916.

7 '0 all whom it may concern Be it known that I, THEODORE F. PHIL- .irri, a citizen of the United States of Amerion. a resident of the city of East St. Lou s, in the county of St. Clair, State of Illinois, have invented certain new and useful Improvcn'ients in Grinding or Polishing Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a. part of this specification.

My invention relates to a machlne particularly adapted for use in polishing tubular articles, but it is to be understood that some of the elements of the machine may be used for various other purposes.

One of the objects of the invention is to 'produce a simple and eflicient means for holding and rotating the article to be oper ated upon by the machine. In the preferred form of the invention a rotatable work holding device is adapted to enter the ends of a tube so as to constitute an internal support for the tube, the entire outer face of the tube being exposed to the polish ing wheel or other work engaging member.

Another object is to provide a simple means for automatically disengaging the polishing wheel from the work upon the completion of each polishing operation.

With the foregoing and other objects in view the invention comprises the novel construction, combination and arrangement of parts hereinafter more specifically described and illustrated in the accompanying drawings wherein is shown the preferred embodiment of the invention; however, it is to be understood that the invention co1nprehends changes, variations and modifications" which come within the scope of the claims hereunto appended.

Figure I is a side elevation of a polishing or grinding machine constructed in accordance with the invention.

Fig. II is an enlarged fragmentary plan view of the elements near the front of the machine.

Fig. III is a front elevation showing the upper portion of the reciprocating carriage and the polishing wheel engaging a tube which travels with the carriage.

Fig. IV is a. fragmentary top view of the reciprocating carriage, illustrating the automatic reversing device. the tube holding elements being removed from'the carriage.

Specification of Letters Patent.

Patented Mar. 13, 1917.

Serial No. 105,168.

Fig. V is an enlarged transverse section taken approximately on the line V-V, Fig. IV.

Fig. VI is an enlarged horizontal section showing the rotatable work driver which travels with the carriage.

Fig. VII is an enlarged horizontal section showing one of the work holding devices.

The main supporting frame includes a base A. provided with wheels 1 (Fig. I) which rest upon tracks 2, said base being movable along the tracks to provide for the polishing or grinding of fiat articles. However, in polishing tubes, the base is merely a stationary supporting frame, for it is held in a fixed position by a retaining device 3 Fig. I) having a recess adapted to receive one of the wheels 1.

B designates a reciprocating carriage constituting a. support for the work IV. the latter being rotated while it travels under a rotating polishing wheel 4. The carriage B comprises a front bar 5, a rear bar 6, side bars 7, connecting said front and rear bar, and a horizontal angle bar 8 to which the work holding elements are secured, as will be presently described. \Vheels 9, se cured to the side bars 7, are adapted to travel along stationary tracks 10.

The work holding elements include a pair of tapered heads 12 and 13 adapted to extend into the opposite ends of the work W to constitute internal supports of the work, leaving the entire outer face of the work exposed to the action of the polishing wheel 4, as shown most clearly in Fig. III. The work W, is a tube and the function of the machine, illustrated in the drawings, is to grind, polish, or otherwise finish the entire outer face of said tube.

The tapered head 12 is provided with a stem 14 arranged within and secured to a shaft 15, the latter being rotatably mounted in a horizontally disposed bearing 16. 17 designatesa driven pulley formed integral with or otherwise suitably secured to the shaft 15. An end thrust member 19, in the form of a screw passing through an arm on the bearing 16, is alined with the axis of the shaft 15 (Fig. VI). This end thrust member extends into the pulley 17. and antifric- -tion balls 20 are interposed between the inner end of the thrust member and a portion of the puiley. The bearing 16, supporting the driving eleinents 12, 14, 15 and 17, is

slidably mounted on the upturned flange of the horizontal angle bar 8 and adjustably secured thereto by set screws 21.

The tapered head 13, which extends into one end of the tube W (Figs. III and VII), is provided with a ed in a tubular slide 23, the latter being slidably fitted to a bearing 24. End thrust balls 25, (Fig. VII) arranged within the tubular slide 23, lie between the inner end of the rotatable stem 22 and a portion of the slide. The tapered head 13 and its stem 22 are secured to the slide 23 by means of a retaining device 26 having an inturned flang'e 27 which engages a collar on a head 13, as shown in Fig. VII. Packing material is preferably interposed between the head 13 and the outer end of the slide 23, as shown in Fig. VII. 28 designates a lubricant cup passing through the retaining device 26 and secured to the slide 23. The lubricant passing from cup 28 flows along the stem 22, into the packing material near one end of the stem and into the thrust bearing at the opposite end of the stem, also flowing through small ports near the thrust bearing (Fig. VII) to lubricate the outer face of the slide The bearing 21, supporting the slide 23 and tapered head 13, is ad justabl y secured, by means of set screws 29, to the upturned flange on the horizontal angle bar 8. Obviously, the bearings 16 and 24 which support the tapered heads 12 and 13 may be adjusted toward and away from each other to locate the tapered heads at the ends of tubes of various different len hs.

he means for releasing the tube \V from the tapered heads 12 and 13 includes an operating lever 30, pivoted at 31 to the slide '23 and connected to an arm on the bearing 24 by means of a link 32 (Figs. II and VII). This operating lever may be moved in one direction to withdraw the tapered head 13 from one end of the tube W, thus releasing the tube from the machine. A spring 33 (Figs. II and VII) connected to the operating lever 30, tends to force the slide 23 and tapered head 13 toward one end of the tube IV, thereby forcing the opposite end of the tube into engagement with the tapered head 12. This retains the tube in engagement with the tapered heads when the machine is in service.

34 designates supporting arms, arranged directly below the tube W and adjustably secured to the horizontal angle bar 8. These arms 31 serve as means for supporting the tube immediately before it is secured to the tapered heads 12 and 13 and immediately after it is removed from said heads.

The polishing wheel 4 is fixed to a shaft 35, rotatably mounted in bearings 36 at the front end of an arm or frame 37, and pro vided with a driven pulley 38. The arm 37 stem 22 rotatably mountis pivotally supported by a shaft 39 (Fig. I) so as to allow the polishing wheel. to move toward and away from the tube \V. lVhen the machine is in service the rotating polishing wheel rests upon the rotating tube and the engaging faces of these elements move in opposite directions. The carriage B reciprocates to carry the rotating tube along the polishing wheel in a line parallel with the axes of the tube and polishing wheel. At the end of each stroke of the reciprocating carriage the polishing wheel is automatically lifted from the tube, as indicated by dotted lines in Fig. III.

The means for disengaging the polishing wheel from the tube comprises a pair of arms -10 adjustably secured to the angle bar 8 which forms part of the reciprocating carriage, said arms being provided with rollers 41 at their upper ends. An abutment member 42 (Figs. I, II and III) is provided with inclined abutment faces 43 which lie in the paths of the rollers 41. Upon the completion of each polishing operation, and immediately before the reciprocating carriage completes its movement in one direction, a roller 41 will strike one of the inchned abutment faces 43 with the result of lifting the polishing wheel from the tube, as indicated by dotted lines in Fig. III, thus preventing the polishing wheel from strikmg the tube supporting elements adjacent to the ends of the tube. \Vhen the movement of the carriage is reversed, the polishing wheel 4 will drop by gravity to its operative position when the roller 41 travels along the inclined abutment faces 43.

Power is transmitted from a shaft 44. (Fig. I) and pulley 45 through belt 46, pulleys 47 and 48, belt 49, pulley 50, and shaft 39 to a pulley 51 which drives a belt 52, the latter bein fitted to the driven pulley 38 on the shaft The akis of the arm 37, which supports the polishing wheel, coincides with the axis of pulley 51 so that the polishing wheel may be moved toward and away from the work without in any way interfering with the operation of the driving mechanism.

A counterbalance lever 53 (Fig. I) pivotally sup orted at 54, is provided with an adjusta le counterweight 55. 56 designates a bracket extending upwardly from the arm 37 and connected to the counterbalance lever 53 by means of a link 57. The counterweight 55 is preferably so arranged that the polishing wheel will drop by gravity to engage the work without exerting undue pressure on the face of the work.

A slidable operating bar 58 (Fig. I) passing through the bracket 56 and fitted to a guide 59, is connected to the weighted end of the counterbalance lever by means of a chain 60 which passes through a loop 61 on the counterbalance lever. The upper of the polishing .wheeL.

end portion of chain 60 is provided with a hook 62 adapted to be inserted into the chain links. The polishing Wheel may be lifted by pulling the slidable operating bar 58. movement being transmitted from said bar through chain (30, counterbalance lever 53. link 57 and bracket 56 to the pivoted arm 37 which supports the polishing wheel. The downward movement of the polishing wheel is limited by a stop device 3 (Fig. I) secured to the operating bar 58 and adapted to engage the bracket 56. The operating bar 58 is provided with a series of holes (it for the reception of the stop device 63, so that the latter may be adjusted to different positions.

The means for reciprocating the carriage B preferably comprises an endless sprocket chain 65 (Figs. 1, II and IV) fitted to sprocket wheels 66 and 67 mounted on shafts 8 and 69. respectively. The chain 5 and sprocket wheels 66 and 67 are supported by stationary parts of the machine, and the chain is driven continuously in one direction through the medium of a worm wheel 70 Fig. I) fixed to the lower end of shaft 69. a worm T1 meshing with said worm wheel. a pulley 712 secured to worm 71, a belt 73 fitted to pulley 72 and a driven pulley H secured to the power shaft 44. A. clutch arm 75, (Fig. IV) pivoted to the reciprocating carriage at 76, is provided with a head 77 having a pair of oppositely disposed teeth 78 adapted to be inserted into the links of the sprocket chain The clutch device. which includes the teeth 78, may occupy a neutral or inoperative position wherein both of the teeth 78 are out of engagement with the constantly running chain 65, and the clutch device may be shifted in either direction to position one of the teeth in the sprocket chain, the direction of movement of the carriage being reversed by releasing one of the teeth 78 from the sprocket chain and inserting the other tooth into said chain.

The automatic device for shifting the clutch elements at predetermined points. includes a shifter lever S. pivotally connected to the carriage at 79 (Figs. IV and V) and provided with an arm 80 connected to the clutch arm 75 by means of a connecting bar 81. Lugs 82, formed on the shifter lever S. are adapted to engage a bar 83 to limit the movements of said lever. 85 designates a rod pivoted at 8.6 to the bar 83. and passing through a swivel 87 on the lever S. A spring 88, surrounding the rod 85. bears against the swivel 87. When the shifter lever is moved a slight distance in either direction from the neutral position. shown in Fig. IV, the spring 89 will move said shifter lever to one of its extrcme positions. wherein one of the lugs 82 will engage the stop bar 83 and one of the clutch teeth 78 will pass into the chain 65. The spring 88 also tends to retain the shifter lever S in its extreme positions.

The means for actuating the shifter lever upon the completion of each stroke of the reciprocating carriage. includes a lug 89 extending downwardly from one arm of the shifter lever (Figs. 1V and V) and adapted to engage abutment sleeves 90, the latter being slidably fitted to a stationary rod U1. Springs 92. fitted to the abutment sleeves 9U. bear against collars 93 on the stationary rod 91. 'hen the movement of the carriage in either direction is almost completed. the pin 89 on the shifter lever S strikes one of the abutment sleeves 90, and the shifter lever then turns on the axis of its pivot 79 so as to move the connecting bar 81 in one direction. thereby releasing one of the clutch teeth 78 from the sprocket chain (35 and engaging the other tooth T8 with said sprocket chain. Guide wheels 94. (Fig. 1V) mounted on the shafts 95. are provided with flanges which prevent the two oppositely moving strands of the sprocket chain from being forced toward each other. the object being to prevent the sprocket chain from yielding too freely when one of the teeth 78 is forced into said chain.

96 designates an operating handle extending from the shifter lever S and adapted to be operated by hand for the purpose of actuating the shifter lever S.

The driven pulley 17, which serves as means for transmitting movement to the work, travels with the reciprocating car riage. but the power mechanism for actuating said pulley is supported independently of the carriage. This power mechanism includes a pulley 97, (Fig. I) a belt 98: pulley 99, an elongated drive shaft 100. secured to the pulley 99. and a belt 101 for transmitting movement from the elongated drive shaft 100 to the pulley 17. The belt 101 travels with the reciprocating carriage 11C and it is pushed along the drive shaft 100 through the medium of pins 10; (Figs. I and ll) which travel with the carriage.

The means for reciprocating the carriage is shown. described and claimed in an application for patent on improvements in machining apparatus. filed by me on June 22, 191G, Serial No. 105,169.

I claim i 1. A polishing machine comprising a reciprocatory carriage. a rotatable work holding device carried by said carriage and adapted to engage the opposite ends of the article to be operated upon. said rotatable work holding device being so arranged that the axis of the work will lie parallel with the path of movmnent of the carriage. a polishing device adapted to engage the outer face of the article operated upon. and means for automatically disengaging said 139 polishing .device from said article after an end of the article reaches said polishing device.

A polishing machine comprising a reciprocator carriage, a rotatable work holding devlce carried by said carriage and adapted to. engage the opposite ends of the article to be 0 erated upon, said rotatable work holding evice beingso arranged that the axis of the work will lie parallel with the path of movement of the carriage, a polishing device adapted to engage the outer face of the article operated upon, and means for automatically disengaging said polishin device from said article after an end of t ie article reaches said polishing device, said means including a traveling member carried by said carriage, and anabutment secured to said polishing device said abutment being located in the path 0 said traveling member.

. 3. A polishing machine comprising a reciprocatory carriage, a rotatable Work holding device carried by said carriage and adapted to engage the opposite ends of the article to be operated upon, said rotatable work holding device being so arranged that the axis of the work will lie parallel with the path of movement of the carriage, a polishing device adapted to engage the outer face of the article operated upon, and means for automatically disengaging said polishing device from said article after an end of the article reaches said polishing device, said means including a pair of rollers carried by said carriage and a pair of inclined abutments secured to the polishing device, said inclined abutments being lo cated in the path of said rollers.

i. In a machine of the character described, a work supporting device, a polishing wheel adapted to engage the article sup ported by said device, a pivoted arm to which said polishing wheel is rotatably secured, a counterbalance lever secured to said arln,

a slidable operating member connected to said counterbalance lever, and an adjustable device for limiting the movements of said slidable operating member in one di rection. 5. In a tube finishing machine, a finishmg wheel, a reciprocatory carriage, a tube holding device carried by said carriage, said tube holding device being extended into the tube to form an internal support therefor, thus leaving the outer face of the tube exposed to engage the finishing Wheel, means for rotating the tube holding device while itis traveling with the carriage, and means for automatically disengaging the finishing wheel from the tube after an end of the tube reaches said finishing wheel.

6. In a tube finishing machine, a reciprocating carriage, a tube supporting device carried by said carriage, said tube supportmg device including a pair of rotatable tube holdmg members adapted to engage the opposite ends of the tube, and said rotatable tube holding members being so arranged that the axis of the tube will lie substantially parallel with the path of said reciprocatory carriage, a rotary polishing wheel the axis of which is substantially parallel with the axis of Said tube, said rotary polishing wheel being arranged to engage the outer face of the tube, a'nd means for automatically shifting said. rotary polishing wheel away from the tube.

7 A machine of the character described having a support, a pair of rotatable work holding members adapted to engage opposite ends of the work, a slide in which one of said rotatable members is mounted, the

last mentioned rotatable member being secured to and carried by said slide and the slide being movable toward and away from the work, and a spring arranged to force said slide toward the Work.

THEODORE F. ITHILIPPI. 

